OOTB linux builds of hsdis often result in binaries targeted to the "wrong" architecture on the following platforms:

arm (32-bit)
ia32
sparcv9

=== arm (32-bit) example ===
$ ls orig/hsdis/build/linux-armv6l/hsdis*
orig/hsdis/build/linux-armv6l/hsdis-armv6l.so
$ LD_LIBRARY_PATH=orig/hsdis/build/linux-armv6l/ java/jdk1.8.0_141/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -version
Java HotSpot(TM) Client VM warning: PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output
Could not load hsdis-arm.so; library not loadable; PrintAssembly is disabled
===

=== ia32 x86 example ===
$ ls ../orig/hsdis/build/linux-i686/hsdis*
../orig/hsdis/build/linux-i686/hsdis-i686.so
$ LD_LIBRARY_PATH=../orig/hsdis/build/linux-i686/ jdk1.8.0_141/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -version
Java HotSpot(TM) Server VM warning: PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output
Could not load hsdis-i386.so; library not loadable; PrintAssembly is disabled
===

=== sparcv9 example ===
$ ls ../orig/hsdis/build/linux-sparc64/hsdis*
../orig/hsdis/build/linux-sparc64/hsdis-sparc64.so
$ LD_LIBRARY_PATH=../orig/hsdis/build/linux-sparc64/ jdk1.8.0_141/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -version
Java HotSpot(TM) 64-Bit Server VM warning: PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output
Could not load hsdis-sparcv9.so; library not loadable; PrintAssembly is disabled
===

Of course, it is not just a matter of the resulting library file name:

=== ia32 example ===
$ mv ../orig/hsdis/build/linux-i686/hsdis-i686.so ../orig/hsdis/build/linux-i686/hsdis-i386.so
$ LD_LIBRARY_PATH=../orig/hsdis/build/linux-i686/ jdk1.8.0_141/bin/java -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -version
Java HotSpot(TM) Server VM warning: PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output
Loaded disassembler from hsdis-i386.so
Decoding compiled method 0xa77a15c8:
Code:
hsdis: bad native mach=architecture not set in Makefile!; please port hsdis to this platform
===

For sparcv9 and ia32, simple Makefile fixes are all that is needed. For 32-bit arm, we also need to add an "arm" architecture to hsdis.c.

After fixing this, the following mappings between "uname -m" output and ARCH should work:

i686 -> i386
sparc64 -> sparcv9
*arm* -> arm

(There are so many variations on 32-bit arm (armel, armeb, armv6l,etc) that the only reasonable thing to do seems to be to map all strings with "arm" in them to "arm". This is not a problem because Linux always seems to use aarch64 for 64-bit arm. We seem to only come across "arm64" on iOS or as an LLVM target.)